1: 3 percent / selenium dioxide, 70percent tert-butyl hydroperoxide / CH2Cl2 / 1.) 0 deg C, 16h, 2.) room temp, 3h 2: 82 percent / triethylamine, 4-(dimethylamino)pyridine / CH2Cl2 / 2 h / Ambient temperature 3: 1.) cuprous cyanide / 1.) ether, -30 deg C, 40 min, 2.) ether, -78 to -30 deg C, 5h, -23 deg C, 16h 4: hydrogen / 5percent palladium on barium carbonate / ethyl acetate / 12 h / 2327.2 Torr 5: 70 percent / d-10-camphorsulfonic acid / dioxane; H2O / 2 h / 80 °C View Scheme